Total reaction cross sections and neutron-removal cross sections of neutron-rich light nuclei measured by the COMBAS fragment-separator

Preliminary results of measurements of the total reaction cross sections σ_R and neutron removal cross section σ_-xn for weakly bound ⁶He, ⁸Li, ⁹Be and ¹⁰Be nuclei at energy range (20-35) A MeV with ²⁸Si target is presented. The secondary beams of light nuclei were produced by bombardment of the ²²Ne (35 A MeV) primary beam on Be target and separated by COMBAS fragment-separator. In dispersive focal plane a horizontal slit defined the momentum acceptance as 1% and a wedge degrader of 200 μm Al was installed. The Bρ of the second section of the fragment-separator was adjusted for measurements in energy range (20-35) A MeV. Two-neutron removal cross sections for ⁶He and ¹⁰Be and one –neutron removal cross sections ⁸Li and ⁹Be were measured.